Chemical fire-extinguisher.



No. 673,383. Patented May 7, |90I.

E. .1. clmpmvm.4 CHEMICAL FIRE EXTINGUISHER.

(Application Bled Dec. 24:x 1900.)

(No Model.)

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UNITED STATES PATENT OFFICE.

EDWARD J. CHAPMAN, OF MERRIMAC, MASSACHUSETTS.

CHEMICAL- FIRE-EXTINGUISHER.

SPECIFICATION forming part of Letters Patent No. 673,383, dated May?,1901.

Application filed December 24, 1900. Serial No. 40,960. (No model.)

To all whom it may concern:

Be it known that I, EDWARD J. CHAPMAN, a citizen of the United States,residing at Merrimac, in the county of Essex and State of Massachusetts,have invented a new and useful Chemical Fire-Extinguisher, of which thefollowing is a specification.

This invention relates to fire-extinguishers, and more particularly tochemical-mixing fire-extinguishers; and the object of the same is toprovide a fire-extinguisher of this nature which is safe and reliable inuse and will not explode, readily charged, discharged, and rechargedWithout injury to any part of the apparatus, and one having a simple automatic operation, a combined handle and discharge-nozzle, and means forpreventing passage of the acid directly into the said nozzle and forpreventing corrosion of the parts.

The invention consists in the construction Will be more fullyhereinafter described and claimed.

In the drawings, Figure 1 is a perspective View of a fire-extinguisherembodying the features of the invention. nFig.12 is a transversevertical section of the same. Fig. 3 is a detail perspective view of theacid-bottleholding cage With the bottle therein and theautomatically-operating cap for the same. Fig. 4 is a sectionalelevation of the parts shown by Fig. 3 in inverted position and the capreleased from the neck or mouth of the bottle.

Similar numerals of reference are employed to indicate correspondingparts in the several views.

The numeral 1 designates the shell or casing, preferably constructed ofthe best hard cold-rolled copper, with the seams overlapped and closelyriveted and sweated with a good quality of solder, the crown 2 andbottom 3 being spun into the shape shown and said crown having a cap 4riveted and sweated thereto. All of the foregoing-named parts are fullycoated with non-corrosive material to prevent injury thereto by thechemicals and conform in general construction and dimensions to thestandard requirements of insurance companies.

To the bottom 3 a stand 5 is secured, and

comprises a plurality of supports 6, preferably formed of cast-brass andsecured to the said bottom, at the joint thereof, by suitable rivets,the lower terminals of the supports being'apertured and having a roundbar 7 passed therethrough and irmly fastened, the said bar forming ahandle or convenient `means of gripping the bottom portion of theextinguisher when using the latter.

The cap 4 is annular and has an upper screw-threaded seat 8 to receive aplug 9, of suitable metal, preferably cast-brass,havinga centraloutlet-opening 10 with a screw-threaded wall. Immediately below the seat8 the cap is formed with an inwardly-extending horizontal seat 11, onwhich is disposed an annular washer 12, directly under the screwthreadedjoint of the plug with the cap, to prevent corroding by the chemicals oracids of the threads of said joint, another shoulder 13 being formed inthe cap inwardly from and below the plane of the seat 11 for a purposewhich will be presently set forth. The outer lower portion of the cap isoffset at an outward angle, as at 14, to receive and have rivetedthereto the upper terminal of the crown 2, the rivets 15 being arrangedat an inward angle and upset against the bottom portion of the cap, asshown.

Within the opening 10 of the cap the lower tubular neck 16 of a combinedhandle and nozzle is securely fastened, first, by a single thread andthen locked against movement by the insertion of a plurality of pins 17,one of the latter being shown in vdotted lines in Fig. 2, and after suchinsertion of the pins the joint is treated with lead to seal the same.The said neck unobstructedly communicates with a curved outlet-conduit18, having a normal vertical direction and continuing into areversely-curved nozzle extremity 19,With a forwardly projected terminalhaving a nozzletip 2O removably mounted therein. From the rear upperportion of the neck a curved grip 21 projects and merges into an upperhorizontal enlarged portion 22, that connects with the conduit 18, andwith the latter said grip forms a substantially elliptical hand-loop fortransporting the extinguisher from one point to another and toconveniently direct the nozzle-tip when the entire device is tilted oroth- IOO . said shell.

being operated, and a steady stream can be obtained therefrom anddirected to any point except those obviously dangerous positions Wherean operator would not stand directly overhead or under foot. The conduitfurnishes a free and clear outlet and prolongs the' stream or flow agreater length of time than in some previous machines using the sameamount of uid. The nozzle-tip is detachable and non-corrosive, and theplug' 9 can be easily turned out when badly stuck by the insertion of awrench or other suitable implement through the looped portion of thecombined device.

The upper angular ends of a plurality of arms 23, forming a cage 24, arehung on the seat ll of the plug 9, and in the cage an acidbottle 25 ismounted and preferably of eightounce capacity and provided with an upperWide outlet-neck 26, having a ground rim 27. Above the neck of theacid-bottle a hollow substantially spherical acid non-porous cup 28 isxed and has depending guards 29 to hold the bottle in place and againstmovement in the cage, and also extending downwardly from the center ofthe upper portion of the cup is a pin 30. Movably mounted in relation toand guided by the said pin is a lead cap 3l of solid hemispherical formand having a vertical opening 32 in the upper portion thereof, intowhich the pin extends. Extending transversely across the lower insertedportion of the neck 16 of the combined handle and nozzle is a guard 33,which keeps the cup from slipping from its place when operated, andbetween the said guard and the top of the cup a reticulated partition 34is positioned and covers the outlet from the shell or casing to serve asa screen to prevent the crystals or foreign matter from passing into thedischarge-conduit.

In the operation of the device the body or shell is tilted or turnedatan angle, so that the cap 3l, which normally bears on the ground rimof the acid-bottle 25, moves olf from the said rim and permits the acidto mingle with the fluid that is placed in the By using a large neckbottle, as shown and set forth, a quick action can be secured and anexcess of carbonio-acid gas generated and simultaneously injected withthe liquid in the shell, the said liquid being a soda solution. Theextinguishing liquid, composed of the soda solution and the acid fromthe bottle, becomes thoroughly formed before passing into thedischargeconduit,

and, as before indicated, said .conduit and its nozzle-tip willmaterially facilitate vthe direction of the liquid on the lire. Afterthe service of the extinguisher is no longer needed it is righted andthe cap gravitates to its normal position and again closes the bottle.

A non-corrosive material will be applied to all the parts Wherenecessary to protect them,

kand other minorincidentals will,y be supplied kaline liquid,a cap insaid body with an opening therethrough, a plug removably mounted in saidcap and having outlet means, a cage suspended from said cap and held inplace by the plug, an acid-containing receptacle movably mounted in thecage with its outlet portion uppermost, an acid cup mounted above andrigidly held within and 'by the cage and provided with a centralprojecting portion, and a Weighted cap of solid form having a lowerhorizontal face to contact with the upper open portion-of saidreceptacle and having an upper opening to loosely receive the projectionof the cup.

2. In achemical re-extinguisher, the combination of a body or shell forholding an alkaline liquid, an lacid-containing receptacle suspended orrhung from the interior top portion of the body or shell and providedwith an upper wide open portion or outlet, an acid-cup mounted above andsurrounding said upper open portion of the said receptacle and havingadepending pin, andaweighted cap of solid form having a lower horizontalface to contact `with the upper open portion of the receptacle, the saidcap also having an upper opening to loosely receive the pin of the cup.

3. In achemicalfire-extinguisher, the combination of a body or shell forholding an alkaline liquid, a cage suspended from the upper innerportion thereof, an acid-'containing receptacle supported by the cageand having an upper outlet, a substantially hollow hemisphericalacid-cup in the cage over the upper portion of the receptacle, aweighted cap movable in relation to and within the cup and having a flatface to loosely bear on the upper open portion of the receptacle, anoutlet device at the top of the shell, a guard against which the cupindirectly bears to hold said cup in place in the cage, and a reticu-`lated partition between the guard and cage and the cup in the latterand the outlet device.

4:. A fire-extinguisher having an upper clos- IIO ing-plug with acombined `handle and nozzle In testimony that I claim the foregoing asconnected thereto, the latter being in the my own I have hereto affixedmy signature in form of a hand-loop With the front portion the presenceof two Witnesses.

tubular and continued above into a. for- EDWARD J. CHAPMAN. 5Wardly-ourved nozzle extremity, and a for- Witnesses:

Wardly-projecting nozzle in the upper termi- CHARLES W. CHAPMAN,

nal of said nozzle extremity. ALMENA G. CHENEY.

